Responsive Design Checker

Perfect your website's responsiveness with this versatile extension. Test it on various mobile devices for an impeccable user interface.

• Overview
• Download
• Source
• Reviews
• Trends
• Toggle Dropdown
  • Source
  • Reviews
  • Trends

Responsive Design Checker is available to install from Firefox Browser Add-ons and for download from this page. It has 33 active users The latest version is 1.0, and it was published 7 months ago.

All available versions

You can find the current and older versions of Responsive Design Checker here. You can download the archived versions or inspect their source codes.

As a free user, you can only download the latest version.

How to install Responsive Design Checker from an XPI file

1. Simply drag-and-drop the XPI into Firefox to install the add-on.

How to install Responsive Design Checker from a ZIP file

1. Download the Responsive Design Checker ZIP file
2. In Firefox browser, go to about:addons to open Add-ons Manager
3. Click on , then select Install Add-on From File
4. Select the Responsive Design Checker ZIP file from step 1. Responsive Design Checker is now installed on your browser.